HP 40gs Manuel d'utilisateur télécharger pdf (Page 172)

100

101

13-18 Using mathematical functions

Examples

ISOLATE(2*X+8,X) returns -4

ISOLATE(A+B*X/C,X) returns -(A*C/B)

LINEAR? Tests whether expression is linear for the specified

variable. Returns 0 (false) or 1 (true).

LINEAR?(expression, variable)

Example

LINEAR?((X^2-1)/(X+1),X) returns 0

QUAD Solves quadratic expression=0 for variable and returns

a new expression, where variable=newexpression. The

result is a general solution that represents both positive

and negative solutions by including the formal variable

S1 to represent any sign: + or – .

QUAD(expression, variable)

Example

QUAD((X-1)

-7,X) returns (2+s1*(2*√7))/2

QUOTE Encloses an expression that should not be evaluated

numerically.

QUOTE(expression)

Examples

QUOTE(SIN(45)) F1(X) stores the

expression SIN(45) rather than the value of SIN(45).

Another method is to enclose the expression in single

quotes.

For example, X^3+2*X F1(X) puts the

expression X^3+2*X into F1(X) in the Function

aplet.

| (

where

) Evaluates expression where each given variable is set to

the given value. Defines numeric evaluation of a symbolic

expression.

expression|(variable1=value1, variable2=value2,...)

Example

3*(X+1)|(X=3) returns 12.

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HP 40gs Manuel d'utilisateur Page 172

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